Electrode.



- J. w. STUBBS. v

ELECTRODE. APPLICATION FILED APE-9,1907- V T/VES S 55 f w PATBNTBD OCT 11965. I 4

UNITED STATES PATENT. OFFICE} JOHN wr LIiM STUBBS, F MIDDLEWIGH,ENGLAND, ASSIGNOR TO THE GENERAL GREAT BRITAIN.

ELECTROLYTIC BARENT COMBANY LIMITED, A JOINT STOCK COMPANY, OF

nmcrnonn.

. Patented Oct. 1, 190

To all whom it may I I Be it known-that I, Joan Wmuur' saunas, asub jectof the King of GreatBritain', residing at Middlewich, in the county ofChester, England, have invented a new and useful Improvement inElectrodes, of which the following is a specification. l'

This invention relates to electr'o des'liziving conductors partlyprotected from the electrolyte, and carbon blocks connected to theconductors and exposed to the 10 electrolyte, and the object is toprovide a composition of high conductivity which may be readily moldedround the endsoi the conductors to protect them while the surface of themass of coir 'ition may be finished of a form which can be readilyfiitedinto the usual ex 5 ternal carbon blocks, so as to render renewal of thelatter easy. In carrying out the invention we 'mix ggether powderedcarbon or graphite, resin, and tetra orid of car bon, the resin andtetrachlorid being in sufficient proportion to make a soft or plasticmass which can be easily molded or poured round the end of the conductorand between any projections thereon without leaving any spaces, and itis then'allowed to dry, or it may be heated to drive off thetetrachlorid of carbon. The invention -is illustrated in theaccompanying drawings in which, I Figure 1 is a sectional view of oneform and Fig. 2 is a like view oianother form.

In Fig. 1. ais a metal conductor covered for the greater part withPortland cement b. c is a mixture of graphite, resin, and tetrachioridof carbon, molded'roundthe end d of the conductor, the outerv surface sof the mass beingfornied to fit into an opening f in the usual carbonblock g. The end d of the conductor is thus efiiciently protected fromchlorin or other corrosive agents in' the 3b electrolyte and at the sametime the electrical resistance of the junction is reduced, while whentheblock'g. is 3 worn it can readily be removed and a new one put on.- his cement for protecting the outer end of the conductor when the openingf is made completely through the 40' block 9.

Fig. 2. is similar to Fig. 1. except that the conductor a instead ofbeing all metallic is provided with carbon pins 11 to connect with theouter blocks g. When these pinsbecomeworn awayat the ends, which happensafter {5 long use and causes loss of efficiency, the pins are repairedby reducing the ends at j preferably to a hexagonal shape, and thenmolding roimd such ends the mixture of carbon or graphite resin, andtetrachlorid of carbon, as before described. The invention is simi- 5'0larly applicable'to other forms of conductor.

Iclaim. a In .the construction or an electrode tl? combination with .theend of an electrical conductor 0 of a mixture -or powdered carbon.resin, and tetiachiarid 0155 if carbon, substantially as den-mined.

In testimony er-co I have signed my name to thisspecification, in thepresence of twosubscrlbing witnesses.

JOHN WILLIAM STUBBS. Witnesses:

W. B. JonNsoN, Jsuns BARRON.

